7 September 2025

• Astronomy: Total lunar eclipse (Blood Moon) visible from India overnight 7-8 September 2025 the first total lunar eclipse visible in India since 2022.
• Environment: India's generics save the US $219 billion annually in healthcare costs pharma diplomacy in focus as US tariff threats intensify.
• Geography: The Red Sea's subsea internet cables face sabotage risk, disrupting connectivity across India and the Middle East.
• Tribal culture: Apatanis tribe of Arunachal Pradesh last generation wearing traditional facial tattoos; practice banned in 1970s.
• Public health: WHO declared Mpox no longer a Public Health Emergency of International Concern by 2025, following a sustained global decline.

GS area: Science and Technology (Astronomy)

A total lunar eclipse occurred on 7 September 2025, visible across India during the night.

• Geometry: The Sun, Earth, and Moon must be precisely aligned (syzygy) with Earth between the other two. The Moon passes fully into Earth's umbra (complete shadow zone), blocking direct sunlight.
• Umbra vs penumbra: The umbra is the darkest, central part of Earth's shadow. The penumbra is the lighter, outer partial shadow. A total eclipse requires the Moon to be entirely within the umbra.
• Why it appears red (Blood Moon): Earth's atmosphere refracts (bends) sunlight around the planet's edges. Only longer-wavelength red and orange light bends enough to reach the lunar surface; blue light scatters away. The effect is identical to Rayleigh scattering that colours sunsets.
• Danjon Scale: Astronomers measure eclipse darkness on a 0-4 scale. L=0 is almost invisible (dark eclipse, heavy atmosphere); L=4 is bright copper-red (clear atmosphere). Volcanic eruptions intensify lunar eclipse darkness.
• Frequency and visibility: Total lunar eclipses occur roughly once every 18 months but are visible only from locations where the Moon is above the horizon during totality.
• Historical importance: Lunar eclipses appear in ancient texts as dating markers. Columbus reportedly used a predicted lunar eclipse in 1504 to intimidate Jamaican indigenous people into providing supplies.
• This eclipse: Visibility extended across Europe, Africa, Asia, and much of the Americas. Totality duration approximately 1 hour 18 minutes.

Static linkage: Science and technology (astronomy, atmospheric optics).

GS area: Geography, International Relations, Science and Technology

Multiple subsea internet cables in the Red Sea were cut or damaged in 2025, causing significant internet disruption across India and the Middle East.

• The Red Sea: Inland sea between northeastern Africa and the Arabian Peninsula. Length approximately 1,930 km from the Suez Canal (Egypt) to Bab el-Mandeb Strait (between Djibouti/Yemen). Width: 300-350 km at broadest.
• Bordering nations: Egypt, Sudan, Eritrea, Djibouti (African side); Saudi Arabia, Yemen (Arabian side). Jordan and Israel have narrow coastlines on the Gulf of Aqaba (northern arm).
• Physical character: Among the world's hottest and saltiest seas. High evaporation rates. Rich coral reef ecosystems. Geologically active part of the rift system that will eventually split Africa.
• Trade importance: Approximately 10-15 per cent of global seaborne trade transits through it annually via the Suez Canal.
• Submarine cables: Fibre-optic cables on the ocean floor carry approximately 95 per cent of international internet and telecommunications data. The Red Sea hosts several major cable systems including SMW-4, IMEWE, and EIG.
• Vulnerability: Cables are at risk from ship anchors (most common), trawling nets, earthquakes, submarine landslides, and deliberate sabotage. The narrow Red Sea makes them harder to avoid.
• Houthi connection: Houthi forces in Yemen have threatened attacks on undersea cables as an extension of their attacks on Red Sea shipping (ongoing since 2023 in solidarity with Gaza).
• India's exposure: India handles about 95 per cent of international internet traffic through undersea cables. Outages impact financial services, cloud computing, and bilateral trade data.

Static linkage: Geography (Indian Ocean, straits), infrastructure, international security.

GS area: Economy, International Relations

India's pharmaceutical sector is under pressure from US tariffs even as generics are proven to save the US healthcare system enormous costs.

• Scale of Indian generics: India is the world's largest supplier of generic medicines to over 200 countries.
• US market share: India supplies approximately 47 per cent of all generic medicines used in the US. Indian generics constitute over 90 per cent of US generic prescriptions by volume.
• Cost savings: Indian generics saved the US healthcare system $219 billion in 2022 alone (IQVIA data). Generics cost 20-25 per cent of the branded equivalent.
• Annual exports: India's pharma exports total approximately $25 billion per year. The US accounts for 31.35 per cent of this.
• WTO/TRIPS context: India uses TRIPS (Trade-Related Aspects of Intellectual Property Rights) flexibilities particularly compulsory licensing to produce generics of patented medicines. India was a key negotiator in the 2001 Doha Declaration on TRIPS and Public Health.
• US tariff threat: 26 per cent general tariff plus 25 per cent penalty on Indian pharmaceutical imports, proposed in 2025, risked reducing access for US patients.
• Soft power angle: India's pharma exports to 200+ countries including low-income nations that cannot afford branded drugs constitute a significant strand of health diplomacy.
• PLI Scheme: Production-Linked Incentive Scheme for pharmaceuticals (₹15,000 crore) supports API (active pharmaceutical ingredient) domestic production to reduce China dependency.

Static linkage: Economy (pharma sector), international trade, health governance.

GS area: Art and Culture, Tribal Affairs

The Apatanis, an indigenous tribal group of Arunachal Pradesh, came into focus as a study of vanishing cultural practices.

• Location: Ziro Valley, Lower Subansiri district, Arunachal Pradesh. The valley itself is a UNESCO Tentative World Heritage Site.
• Population: Approximately 60,000-70,000. A small, geographically concentrated group.
• Facial tattoos and nose plugs: Women of the last generations received facial tattoos around age 10. A vertical line ran from the forehead to the nose tip; five horizontal lines were tattooed on the chin. Large wooden discs (Yaping Hullo) were inserted into the nose.
• Origin of the practice: The Apatanis were considered exceptionally attractive by neighbouring tribes. Raids to abduct Apatani women were reportedly common. The tattoos and plugs were devised to make women less attractive to raiders.
• Banning: The practice was banned in the 1970s. The last generation of tattooed women are now elderly.
• Agriculture: The Apatanis practice one of the most efficient traditional paddy-fish cultivation systems. Paddy fields are interspersed with fish ponds a centuries-old sustainable practice now attracting ecological research.
• Religion: Practice Donyi-Polo (Sun-Moon worship) an indigenous faith system gaining recognition under India's tribal religion policies.

Static linkage: Art and culture, tribal affairs, social issues.

GS area: Science and Technology, Health

Mpox (formerly called monkeypox) was declared no longer a Public Health Emergency of International Concern (PHEIC) by the WHO in 2025 following a sustained global decline.

• Causative agent: Monkeypox virus (MPXV). Genus Orthopoxvirus same genus as smallpox (Variola) and cowpox.
• First identified: 1958 in research monkeys in Denmark (hence the historical name). First human case: 1970 in Democratic Republic of Congo.
• Two clades: Clade I (Central Africa, historically more severe) and Clade II (West Africa, caused the 2022 global outbreak). Clade IIb drove the 2022 PHEIC.
• Transmission:
  • Animal-to-human: Through bites, scratches, or handling rodents and primates.
  • Human-to-human: Prolonged skin contact, sexual contact (especially close-contact networks), respiratory droplets (requires prolonged proximity), contaminated objects.
• Symptoms: Incubation 5-21 days. Fever, headache, muscle pain, swollen lymph nodes (distinguishes from smallpox), rash evolving from flat macules to papules, vesicles, and scabs.
• 2022 outbreak: Declared PHEIC in July 2022. Over 95,000 confirmed cases in 115 countries. India reported fewer than 50 cases.
• Vaccine: Modified Vaccinia Ankara (MVA-BN, brand name Jynneos) approved by US FDA and European regulators.
• 2025 status: WHO ended the PHEIC designation after cases dropped consistently across all regions.

Static linkage: Science and technology (infectious diseases), public health.

GS area: Art and Culture, Polity (National Symbols)

The State Emblem of India adopted on 26 January 1950 is an adaptation of the Lion Capital of Ashoka at Sarnath.

• Original artefact: The Ashoka Lion Capital was erected by Emperor Ashoka of the Maurya dynasty (3rd century BCE) at Sarnath, Uttar Pradesh the site of the Buddha's first sermon (Dhamma Chakra Pravartana).
• Structure of the original: Four Asiatic lions seated back-to-back on a circular abacus. The abacus shows a frieze of a galloping horse, a bull, an elephant, and a lion, separated by four 24-spoked Dharma Chakras. The whole structure rests on a bell-shaped inverted lotus.
• What India adopted: The three visible lions (the fourth is behind and hidden), along with the abacus (the lotus base was dropped). Motto added below: "Satyameva Jayate" (Truth Alone Triumphs) from the Mundaka Upanishad, in Devanagari script.
• Adoption date: 26 January 1950 (Republic Day).
• Preserved at: Sarnath Archaeological Museum, Uttar Pradesh.
• State Emblem (Usage and Prohibition) Act, 2005: Governs who may use the State Emblem and restricts commercial misuse.

Static linkage: Art and culture (Mauryan heritage, Buddhist sites), national symbols.

GS area: Agriculture, Economy

Nilgiri tea a Geographical Indication (GI) protected product is facing a crisis of below-cost green leaf prices.

• Botanical origin: Camellia sinensis, processed differently from Darjeeling (lighter oxidation) and Assam (heavy oxidation). Nilgiri is brisk, fragrant, and full-bodied.
• Geographic requirement: Grown at altitudes of 1,000-2,500 metres in the Nilgiris district, Tamil Nadu (Western Ghats). Benefits from two monsoons (Southwest and Northeast), fog, and lateritic soil.
• GI status: Received Geographical Indication tag in 2008 the first tea in South India to receive this protection.
• Scale: About 32 harvests (pluckings) per year. First harvest after winter dormancy is the "frost tea" highest quality and price.
• Crisis drivers: Green leaf prices have fallen below production costs. Overcapacity among factories, auction manipulation, weak price discovery, high labour costs, and competition from cheap Kenyan tea are the key causes.
• Policy significance: Illustrates the limits of GI protection when market and structural factors undercut producers. Comparison point: Darjeeling tea faces similar pressures.

Static linkage: Agriculture (plantation crops), economy (commodity markets, GI tags).

• CoWIN portal status: India's COVID-19 vaccination tracking platform was unavailable since early August 2025, blocking certificate access for thousands. Over 2 billion doses tracked through the platform since January 2021.
• Climate-resilient cities: India's urban population projected to reach 1 billion by 2070. One-quarter of major city roads are already flood-prone. Smart Cities Mission, AMRUT, and Heat Action Plans (pioneered in Ahmedabad) are the primary policy instruments.